Warp stop-motion for looms.



W. I. STIMPSONKL A. E. RHOA DES.

WARP STQP MOTION FOR LOOMS. APPLIUATION FILED MAR. 31, 1911.

. Patnted Jan; 9,1912.

8%, 47km.) r SLR seating like parts.

constructed and arranged that when the or active detector, so that the meal bank it is covered by parts of the mechrnn sac jll l jhl lt litjlil.

WALLACE'I. STIMPSON AND ALONZO E. RI'IOADES, 0F HDPEDALE, MASSACHUSETTS, ASSIGITORS T0 DRAPER COMPANY, OF HOPEDALE, MASSACHUSETTS, A CORPORA- TION OF MAINE.

'WARP fiTOP-MOIIGN LOGMS.

To all whom it may concern: I

Be it known that we, WALLACE l'. S'rnIr- SON and ALoNzo E. RI-IOADES, both citizens of the United States, and residents of Hopedale, county of lVorcestcr, State of Massachusetts, have invented an Improvement in lVarp Stop-hlotions for Looms, of which the following description, in connection with the accompanying drawing, is a specification, like characters on the drawing repre- This invention has for its object the pro ductlon of a warp stop-motion for looms so loom is stopped by a warp fault the weaver can readily note in which one of a plurality of banks of detectors is located the released faulty Varpthread can be found promptly.

In the ordinary form of double-bank stopmotion apparatus wherein the detectors are suspended from the warp thi'eads and are almost wholly below the warp the construction is such that it is very hard for the Weaver to ascertain readily where the re leased detector is located, for it it is in the anism in front, and if in the front bank the arrangement of the fceler device obstructs the view.

In our present invention we have so arranged the feeling instrumentality that a clear view of the front bank of detectors can be had at all times, and by certain changes and novel features of construction we have provided for a substantially unobstructed View of the lower ends of the detcctors of the; rear bank, so that a released detector in such rear bank can be seen with comparative ease.

We have also devised certain novel structural features whereby the warp stop-1notion as a Whole is improved.

The novel features of our invention will be fully described in the subjoined specification and particularly pointed out in the fol lowing claims.

.Figure 1 is a left-hand side elevation and 1 Specification of Letters Patent.

Application filed March 31-,

Patented Jan. 9,1912.

i911. Serial Ho. 616,217.

part section of a portion of a loom, provided with a warp stop-motion embodying our present invention; Fig. 2 is an enlarged front view, broken out between its ends, of that part of the warp stop-motion illustrated in Fig. 1; Fig. 3 is a top plan view of the left hand end of the mechanism shown in Fig. 2; Fig. 4 is a transverse sectional detail on the line Fig. 2, looking toward the right; Fig. 5 is a detached view of one of the end supports, to be referred to; Fig. 6 a view of the two-part pivot on which the lease-rod guide is fulcrumed; Fig. 7 is a sectionaldetail similar to Figl 4, but showing a released detector in the rear bank of detectors, to illustrate the visibility of such detector when the loom has been stopped thereby.

Stands A opposite each other on the loom side support the novel position of the war stop n'iotion between the whip-roll and the harnesses ll, Fig. l, at a convenient distance back of the latter. The head a of a bracket ha ving a depending and tronhvardly curved foot as is mounted on each stand it", each foot having a bearing; m for a transverse feeler roclcshattf having attached upturned arms f near its ends. Fig. 2. A bifurcated car (1 on each bracket head has upright parallel slots (0, and the upper end of each foot a has two parallel and vertical sawcuts a made in its inner face, Fig. 2, a

horizontal pin a being driven into each cut, to support and position in parallelism the detector guides or bars (L7, the ends of the latter being dropped into opposite saw-cuts and resting on the pins. Each bar a serves as a guide for a series or bank of vertically movable drop detectors (1, longitudinally slotted at (Z for the reception oi. the bar, and also to serve as .a warp-eye, as shown in Fig. 4. The two banks of detectors are suspended from and hang below the Warpthreads we. in, between the lease-rods L, L, and it: will be apparent that a very small portion of a detector is visible above the warp at any time, so that the locating of a released detector must be :mdcrtaken below ,holes 4, Fig. 5, for the reception of bolts 5 passed through the slots of the ears a said bolts clamping the plates 3 iii-vertically adjusted position on the inner faces of the ears, the enlarged ends 6 of a. plate 3 crossing the eyes liopposite the ends of the leaserods. Each plate 3 has a central hole 7 and an intersecting upright groove 8 on its inner the outer end. of a cylindrical member 10 0t pivot device, internally threaded at 11 for the reception of the attaching screw 12 when passed through the hole. 7, the screw thus locking the member 10 on the end plate while the lugs 9 "prevent rotation of such member. The member 10 forms a fulcrum for the lease-rod guide 2, the latter having a hole'lE-l, see dotted lines Fig. for the reception of said member 10, the rectangular head 14 of the latter being provided with a vertical slot 15 crossed near its lower end by a transverse pin 16. A rod 17 constituting a warp-rest is dropped into the opposite slotted heads 14: and is supported in the slots 15 thereof by the pins 16, sothat said warprest canbe readily inserted or removed, and in. a similar manner the detector guides. a can be easily inserted in or removed from their supports, previously described, in the upper ends of the bracket feet a. The seats thus made for the Warp-rest and for the de-' tector guides are'easily constructed and r-e-- duce the cost of manufacture materially.

Transverse back-stop bars I), b are bolted to the front and rear edges'of the iieet a to serve as steps or supports for released detectors in the front and rear banks, respectively, when cotiperatm g with the teeler, and it will be seen by inspection of Flgs. 2,

4 and 7 thdt the front bar 5 for the greater part of its length is quite shallow, its upper edge being so low down that the lower ends of the detectors in the rear bank are clearly visible from the loom side. That. is, beneath the lower ends of the front bank of detectors and the top of the back-stop b there is a clear space through which the weaver can see not only the lower ends of the detectors of the rear bank, but he can also see plainly a released detector, as cl, (see dotted lines Fig. 2) in such rear bank, and can thus as readily locateit as if it were in the front banjc I We. have shown' l..-shaped brackets c-bolted Ito-the hack-stop b and extended frontward horizontally beneath the two backstops, Fig. 4, bosses c on the front ends of the said brackets loosely embracing the shaft fadjacen-t the bearings (H, as in Fig. 2. Horizontal ribsc on the lowerportions of 'the' brackets 0 support slides f pivotally connected by short links f with the rocker'arms f, the slides having upright ears j which carry transversely extended flat plates f" which serve as. feelers.

preventing any tipping movement of the said slides on the. ribs 0. The feelers f" arereciprocated back and forth beneath the detectors by the normal rocking motion of the Lugs 0 overhang the slides f to serve as guides or stops for.

shaftf, see Fig. l, the warp-threads'while intact maintaining'the lower ends of the detectors above the substantially horizontal path of movement of the feelers. When a warp-thread fails its detector will drop into abnormal positiom as at d Fig. 7, and will engage theifceler f" corresponding with the rear bank of detectors,- to thereby arrest the feeler device as a whole on its rearward or feeling stroke, the back-stop 7) serving to hold the released detector against backward pressure. In a similar manner the back-stop b will act when a released detector in the tront bank engages its corresponding feeler f".

The means ing of the rock-shaft f andforbringing about the stoppage of the loom when arrest of the feeler device is caused by aireleased tor effecting the normal rockdetector may be ofany suitable or well known character, of which there are numerous examples 'in the art. @ne of these devices is shown and described in United States Patent No. 797,671 granted to Draper, August 22, 1905. The link 27 in that patent corresponds to the link 23 partly shown herein, said link 23 being connected with a rocker-arm 22 loose on the shaft f, which latter has fast upon it an adjacent collar'20. A spring 21 connectedwith said collarand rocker-arm provides a connection between said armand shaft which will yield when a released detector engages and arrests the normal vibrational movement of the feeler. As shown in Fig. 2 a lateral lug24 on the hub of arm 22 is adapted to engage a similar lug 25 on a collar 26 fast on the shaft, (said lugs being shown by dotted lines in Fig. 2) so that the retracting stroke of the feeler members f is efiected positively when the link 23 is drawn downward.

While the lower ends of both banks of detectors are easily seen at all times by the weaver, whether ornot the feeler device is in motion, yet the 'location of the latter well below the detectors, and the movement of the feeler members f" in a substantially horizontal path, tend to still further open up to view this part of the warp stop-motion, as will be apparent.

'When the loom stops it is convenient for horas-ea the weaver to ascertain instant-lyif such hereinbefore referred to, the arm 30 being shaped as a handle, and by swinging said warp fault.

handle to the left, Fig. 1, the feelers f will be moved in the direction of the feeling stroke if the warp-threads are intact, showing that loom stoppage was not due to a If a released detector has brought about loom stoppage then the handle 30 cannot be swung to the left and the weaver knows that a warp-fault has brought about the stoppage of the loom.

Having fully described our invention, what we claim as new and desire to secure by Letters Patent is:

1. In a warpstop-motion for looms, vertically movable detectors arranged in two parallel banks and suspended from and maintained elevated by intact warp-threads, said detectors being almost wholly below and concealed by the warp-threads, fixed guides for said detectors, located below the warp, the lower ends of the detectors tending below said guides, a stationary backstop for each bank, to support the rear edge of a released detector, the front stop having its upper edge at a distance below the lower ends of the detectors of the front bank, to leave an: unobstructed sight opening through which the lower ends of the detectors of the rear bank, and a released detector in such "ing a depending. frontivardly curved foot, a

feeler roclcshaft supported by thelower ends of said feel, open seats in the upper portions of said foot, located opposite each other, transverse and parallel detectorgu'idcs removably mounted in the seats, a bank of" longitudinally slotted detectors loos'ely strung upon each guideand suspended trom thewarp-threads between the lease-rods,'; said lease-rods, positioning means for the same, mounted on the brackets,=a plurality of fixedly connected feelcr members, one for each bank of detectors,

supporting means on the inner faces of thebracket feet, on which the feeler members are shdably sustained, and operating conin a substantially horizontal nections between the rockehaft and said members to effect normal vibration thereof ath.

3. In a warp stop-motion or looms, op posite, fixedly supported brackets each having an upturned ear, an end-plate bolted to each ear on its inner face, a pivot member carried by and extended inwardly from each end-plate, a fore and aft guide mem ber fulcrumed-on the inner end of each of the pivot members and having eyes at its ends opposite the extremities of the adjacent end-plate, leaserods loosely extended through the eyes and vertically supported by the. warp threads, the end-plates limitingendwisc movement of the leaserods, a

her, having an upright slot and a pin crossing the lower end of such slot, and a warprestdetachably held in the slotted heads and vertically supported by thetransverse pins, combined with two banks of detcctorscsuspended from and hanging below the warpthreads between the lease-rods, the warp rest being located between the two banks of derectors. v

4. Ina warp stop-motion for looms, vertically movable controllingdetectors arranged in, two transverse, parallel banks,

suspended from and maintained elevated by intact warp-threads, a pair of teeler inen'iborsnormally vibrating back and forth in a substantially horizontal path below the banks of detectors andadapted to be enand arrested by a released detector, and a fixed, transverse bar for each bank, to support the rear edge of a released detector when in engagement with its fecler -member, the upper edge of the frontbar being below the lower ends of the front bank of detectors andv exposing to view the lower ends ol 0 detectors in the rear bank, whether the l or detectors be in normal or abnormal position. I

5. In a warp stop-motitni for looms,'opposite, fixedly supported brackets each having a depending, frontwardly extended foot, a feeler rock-shaft supported by the lower ends of said feet, transverse and parallel detcctor-guidcs shstained by the upper portions of the feet, a bank of longitudinally slotted detectors loosely strungupon each guide and suspended from and almost wholly below thepump-threads, fixedly connected feelcr members, one for each bank, supports on the inner faces of the bracket feet, on which the fceler members are slidably sustained, operating connectionsbetween said teeleranembers and the rock-shaft, to effect head on the inner end of each pivot memeach stop serving to support the rear edge names to this specification, in the presence of a released detector in the corresponding of two subscribing Witnesses. bank, the upper edge of the front stop being WA LLAOE I STIMPSON below the lower ends of the detectors of 1-. the front bank, to permit an unobstructed i ALONZO RHOADEJIS view of the lower end of 21 released detector Witnesses: 1n the rear bank. J. L. Rmrmo'roN, J r., Iv

In testlmony whereof, We have slgned our E. D. ()seooo. 

